| Bactroceras Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | †Riocerida |
| Family: | †Bactroceratidae King & Evans, 2019 |
| Genus: | †Bactroceras Holm, 1898 |
| Synonyms | |
| |
Bactroceras is a genus of orthoceratoid cephalopods that lived during the early Middle Ordovician, from about 472—464 mya, existing for approximately 8 million years.[1]
- ^ Nautiloidea – Ellesmerocerida by W.M Furnish and Brian F. Glensister; Treatise on Invertebrate Paleontology Part K R.C. Moore (ed) Univ.Kans. press